1 /* 2 * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c. 3 * 4 * Copyright (C) 2000 VA Linux Co 5 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com> 6 * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> 7 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 8 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) 9 * Copyright (C) 2000 Hewlett-Packard Co. 10 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com> 11 * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs 12 */ 13 14 #include <linux/kernel.h> 15 #include <linux/gfp.h> 16 #include <linux/fs.h> 17 #include <linux/types.h> 18 #include <linux/file.h> 19 #include <linux/icmpv6.h> 20 #include <linux/socket.h> 21 #include <linux/syscalls.h> 22 #include <linux/filter.h> 23 #include <linux/compat.h> 24 #include <linux/security.h> 25 #include <linux/export.h> 26 27 #include <net/scm.h> 28 #include <net/sock.h> 29 #include <net/ip.h> 30 #include <net/ipv6.h> 31 #include <asm/uaccess.h> 32 #include <net/compat.h> 33 34 static inline int iov_from_user_compat_to_kern(struct iovec *kiov, 35 struct compat_iovec __user *uiov32, 36 int niov) 37 { 38 int tot_len = 0; 39 40 while (niov > 0) { 41 compat_uptr_t buf; 42 compat_size_t len; 43 44 if (get_user(len, &uiov32->iov_len) || 45 get_user(buf, &uiov32->iov_base)) 46 return -EFAULT; 47 48 if (len > INT_MAX - tot_len) 49 len = INT_MAX - tot_len; 50 51 tot_len += len; 52 kiov->iov_base = compat_ptr(buf); 53 kiov->iov_len = (__kernel_size_t) len; 54 uiov32++; 55 kiov++; 56 niov--; 57 } 58 return tot_len; 59 } 60 61 int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg) 62 { 63 compat_uptr_t tmp1, tmp2, tmp3; 64 65 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || 66 __get_user(tmp1, &umsg->msg_name) || 67 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || 68 __get_user(tmp2, &umsg->msg_iov) || 69 __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) || 70 __get_user(tmp3, &umsg->msg_control) || 71 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || 72 __get_user(kmsg->msg_flags, &umsg->msg_flags)) 73 return -EFAULT; 74 kmsg->msg_name = compat_ptr(tmp1); 75 kmsg->msg_iov = compat_ptr(tmp2); 76 kmsg->msg_control = compat_ptr(tmp3); 77 return 0; 78 } 79 80 /* I've named the args so it is easy to tell whose space the pointers are in. */ 81 int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov, 82 struct sockaddr_storage *kern_address, int mode) 83 { 84 int tot_len; 85 86 if (kern_msg->msg_namelen) { 87 if (mode == VERIFY_READ) { 88 int err = move_addr_to_kernel(kern_msg->msg_name, 89 kern_msg->msg_namelen, 90 kern_address); 91 if (err < 0) 92 return err; 93 } 94 kern_msg->msg_name = kern_address; 95 } else 96 kern_msg->msg_name = NULL; 97 98 tot_len = iov_from_user_compat_to_kern(kern_iov, 99 (struct compat_iovec __user *)kern_msg->msg_iov, 100 kern_msg->msg_iovlen); 101 if (tot_len >= 0) 102 kern_msg->msg_iov = kern_iov; 103 104 return tot_len; 105 } 106 107 /* Bleech... */ 108 #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) 109 110 #define CMSG_COMPAT_DATA(cmsg) \ 111 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) 112 #define CMSG_COMPAT_SPACE(len) \ 113 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) 114 #define CMSG_COMPAT_LEN(len) \ 115 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) 116 117 #define CMSG_COMPAT_FIRSTHDR(msg) \ 118 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ 119 (struct compat_cmsghdr __user *)((msg)->msg_control) : \ 120 (struct compat_cmsghdr __user *)NULL) 121 122 #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ 123 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ 124 (ucmlen) <= (unsigned long) \ 125 ((mhdr)->msg_controllen - \ 126 ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) 127 128 static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, 129 struct compat_cmsghdr __user *cmsg, int cmsg_len) 130 { 131 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); 132 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > 133 msg->msg_controllen) 134 return NULL; 135 return (struct compat_cmsghdr __user *)ptr; 136 } 137 138 /* There is a lot of hair here because the alignment rules (and 139 * thus placement) of cmsg headers and length are different for 140 * 32-bit apps. -DaveM 141 */ 142 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, 143 unsigned char *stackbuf, int stackbuf_size) 144 { 145 struct compat_cmsghdr __user *ucmsg; 146 struct cmsghdr *kcmsg, *kcmsg_base; 147 compat_size_t ucmlen; 148 __kernel_size_t kcmlen, tmp; 149 int err = -EFAULT; 150 151 kcmlen = 0; 152 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; 153 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 154 while (ucmsg != NULL) { 155 if (get_user(ucmlen, &ucmsg->cmsg_len)) 156 return -EFAULT; 157 158 /* Catch bogons. */ 159 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) 160 return -EINVAL; 161 162 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + 163 CMSG_ALIGN(sizeof(struct cmsghdr))); 164 tmp = CMSG_ALIGN(tmp); 165 kcmlen += tmp; 166 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); 167 } 168 if (kcmlen == 0) 169 return -EINVAL; 170 171 /* The kcmlen holds the 64-bit version of the control length. 172 * It may not be modified as we do not stick it into the kmsg 173 * until we have successfully copied over all of the data 174 * from the user. 175 */ 176 if (kcmlen > stackbuf_size) 177 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); 178 if (kcmsg == NULL) 179 return -ENOBUFS; 180 181 /* Now copy them over neatly. */ 182 memset(kcmsg, 0, kcmlen); 183 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 184 while (ucmsg != NULL) { 185 if (__get_user(ucmlen, &ucmsg->cmsg_len)) 186 goto Efault; 187 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) 188 goto Einval; 189 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + 190 CMSG_ALIGN(sizeof(struct cmsghdr))); 191 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) 192 goto Einval; 193 kcmsg->cmsg_len = tmp; 194 tmp = CMSG_ALIGN(tmp); 195 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || 196 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || 197 copy_from_user(CMSG_DATA(kcmsg), 198 CMSG_COMPAT_DATA(ucmsg), 199 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) 200 goto Efault; 201 202 /* Advance. */ 203 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); 204 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); 205 } 206 207 /* Ok, looks like we made it. Hook it up and return success. */ 208 kmsg->msg_control = kcmsg_base; 209 kmsg->msg_controllen = kcmlen; 210 return 0; 211 212 Einval: 213 err = -EINVAL; 214 Efault: 215 if (kcmsg_base != (struct cmsghdr *)stackbuf) 216 sock_kfree_s(sk, kcmsg_base, kcmlen); 217 return err; 218 } 219 220 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) 221 { 222 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 223 struct compat_cmsghdr cmhdr; 224 int cmlen; 225 226 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { 227 kmsg->msg_flags |= MSG_CTRUNC; 228 return 0; /* XXX: return error? check spec. */ 229 } 230 231 if (!COMPAT_USE_64BIT_TIME) { 232 struct compat_timeval ctv; 233 struct compat_timespec cts[3]; 234 if (level == SOL_SOCKET && type == SCM_TIMESTAMP) { 235 struct timeval *tv = (struct timeval *)data; 236 ctv.tv_sec = tv->tv_sec; 237 ctv.tv_usec = tv->tv_usec; 238 data = &ctv; 239 len = sizeof(ctv); 240 } 241 if (level == SOL_SOCKET && 242 (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) { 243 int count = type == SCM_TIMESTAMPNS ? 1 : 3; 244 int i; 245 struct timespec *ts = (struct timespec *)data; 246 for (i = 0; i < count; i++) { 247 cts[i].tv_sec = ts[i].tv_sec; 248 cts[i].tv_nsec = ts[i].tv_nsec; 249 } 250 data = &cts; 251 len = sizeof(cts[0]) * count; 252 } 253 } 254 255 cmlen = CMSG_COMPAT_LEN(len); 256 if (kmsg->msg_controllen < cmlen) { 257 kmsg->msg_flags |= MSG_CTRUNC; 258 cmlen = kmsg->msg_controllen; 259 } 260 cmhdr.cmsg_level = level; 261 cmhdr.cmsg_type = type; 262 cmhdr.cmsg_len = cmlen; 263 264 if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) 265 return -EFAULT; 266 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) 267 return -EFAULT; 268 cmlen = CMSG_COMPAT_SPACE(len); 269 if (kmsg->msg_controllen < cmlen) 270 cmlen = kmsg->msg_controllen; 271 kmsg->msg_control += cmlen; 272 kmsg->msg_controllen -= cmlen; 273 return 0; 274 } 275 276 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) 277 { 278 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 279 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); 280 int fdnum = scm->fp->count; 281 struct file **fp = scm->fp->fp; 282 int __user *cmfptr; 283 int err = 0, i; 284 285 if (fdnum < fdmax) 286 fdmax = fdnum; 287 288 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { 289 int new_fd; 290 err = security_file_receive(fp[i]); 291 if (err) 292 break; 293 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags 294 ? O_CLOEXEC : 0); 295 if (err < 0) 296 break; 297 new_fd = err; 298 err = put_user(new_fd, cmfptr); 299 if (err) { 300 put_unused_fd(new_fd); 301 break; 302 } 303 /* Bump the usage count and install the file. */ 304 get_file(fp[i]); 305 fd_install(new_fd, fp[i]); 306 } 307 308 if (i > 0) { 309 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); 310 err = put_user(SOL_SOCKET, &cm->cmsg_level); 311 if (!err) 312 err = put_user(SCM_RIGHTS, &cm->cmsg_type); 313 if (!err) 314 err = put_user(cmlen, &cm->cmsg_len); 315 if (!err) { 316 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); 317 kmsg->msg_control += cmlen; 318 kmsg->msg_controllen -= cmlen; 319 } 320 } 321 if (i < fdnum) 322 kmsg->msg_flags |= MSG_CTRUNC; 323 324 /* 325 * All of the files that fit in the message have had their 326 * usage counts incremented, so we just free the list. 327 */ 328 __scm_destroy(scm); 329 } 330 331 static int do_set_attach_filter(struct socket *sock, int level, int optname, 332 char __user *optval, unsigned int optlen) 333 { 334 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; 335 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); 336 compat_uptr_t ptr; 337 u16 len; 338 339 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || 340 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || 341 __get_user(len, &fprog32->len) || 342 __get_user(ptr, &fprog32->filter) || 343 __put_user(len, &kfprog->len) || 344 __put_user(compat_ptr(ptr), &kfprog->filter)) 345 return -EFAULT; 346 347 return sock_setsockopt(sock, level, optname, (char __user *)kfprog, 348 sizeof(struct sock_fprog)); 349 } 350 351 static int do_set_sock_timeout(struct socket *sock, int level, 352 int optname, char __user *optval, unsigned int optlen) 353 { 354 struct compat_timeval __user *up = (struct compat_timeval __user *)optval; 355 struct timeval ktime; 356 mm_segment_t old_fs; 357 int err; 358 359 if (optlen < sizeof(*up)) 360 return -EINVAL; 361 if (!access_ok(VERIFY_READ, up, sizeof(*up)) || 362 __get_user(ktime.tv_sec, &up->tv_sec) || 363 __get_user(ktime.tv_usec, &up->tv_usec)) 364 return -EFAULT; 365 old_fs = get_fs(); 366 set_fs(KERNEL_DS); 367 err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime)); 368 set_fs(old_fs); 369 370 return err; 371 } 372 373 static int compat_sock_setsockopt(struct socket *sock, int level, int optname, 374 char __user *optval, unsigned int optlen) 375 { 376 if (optname == SO_ATTACH_FILTER) 377 return do_set_attach_filter(sock, level, optname, 378 optval, optlen); 379 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) 380 return do_set_sock_timeout(sock, level, optname, optval, optlen); 381 382 return sock_setsockopt(sock, level, optname, optval, optlen); 383 } 384 385 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, 386 char __user *optval, unsigned int optlen) 387 { 388 int err; 389 struct socket *sock = sockfd_lookup(fd, &err); 390 391 if (sock) { 392 err = security_socket_setsockopt(sock, level, optname); 393 if (err) { 394 sockfd_put(sock); 395 return err; 396 } 397 398 if (level == SOL_SOCKET) 399 err = compat_sock_setsockopt(sock, level, 400 optname, optval, optlen); 401 else if (sock->ops->compat_setsockopt) 402 err = sock->ops->compat_setsockopt(sock, level, 403 optname, optval, optlen); 404 else 405 err = sock->ops->setsockopt(sock, level, 406 optname, optval, optlen); 407 sockfd_put(sock); 408 } 409 return err; 410 } 411 412 static int do_get_sock_timeout(struct socket *sock, int level, int optname, 413 char __user *optval, int __user *optlen) 414 { 415 struct compat_timeval __user *up; 416 struct timeval ktime; 417 mm_segment_t old_fs; 418 int len, err; 419 420 up = (struct compat_timeval __user *) optval; 421 if (get_user(len, optlen)) 422 return -EFAULT; 423 if (len < sizeof(*up)) 424 return -EINVAL; 425 len = sizeof(ktime); 426 old_fs = get_fs(); 427 set_fs(KERNEL_DS); 428 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); 429 set_fs(old_fs); 430 431 if (!err) { 432 if (put_user(sizeof(*up), optlen) || 433 !access_ok(VERIFY_WRITE, up, sizeof(*up)) || 434 __put_user(ktime.tv_sec, &up->tv_sec) || 435 __put_user(ktime.tv_usec, &up->tv_usec)) 436 err = -EFAULT; 437 } 438 return err; 439 } 440 441 static int compat_sock_getsockopt(struct socket *sock, int level, int optname, 442 char __user *optval, int __user *optlen) 443 { 444 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) 445 return do_get_sock_timeout(sock, level, optname, optval, optlen); 446 return sock_getsockopt(sock, level, optname, optval, optlen); 447 } 448 449 int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) 450 { 451 struct compat_timeval __user *ctv; 452 int err; 453 struct timeval tv; 454 455 if (COMPAT_USE_64BIT_TIME) 456 return sock_get_timestamp(sk, userstamp); 457 458 ctv = (struct compat_timeval __user *) userstamp; 459 err = -ENOENT; 460 if (!sock_flag(sk, SOCK_TIMESTAMP)) 461 sock_enable_timestamp(sk, SOCK_TIMESTAMP); 462 tv = ktime_to_timeval(sk->sk_stamp); 463 if (tv.tv_sec == -1) 464 return err; 465 if (tv.tv_sec == 0) { 466 sk->sk_stamp = ktime_get_real(); 467 tv = ktime_to_timeval(sk->sk_stamp); 468 } 469 err = 0; 470 if (put_user(tv.tv_sec, &ctv->tv_sec) || 471 put_user(tv.tv_usec, &ctv->tv_usec)) 472 err = -EFAULT; 473 return err; 474 } 475 EXPORT_SYMBOL(compat_sock_get_timestamp); 476 477 int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) 478 { 479 struct compat_timespec __user *ctv; 480 int err; 481 struct timespec ts; 482 483 if (COMPAT_USE_64BIT_TIME) 484 return sock_get_timestampns (sk, userstamp); 485 486 ctv = (struct compat_timespec __user *) userstamp; 487 err = -ENOENT; 488 if (!sock_flag(sk, SOCK_TIMESTAMP)) 489 sock_enable_timestamp(sk, SOCK_TIMESTAMP); 490 ts = ktime_to_timespec(sk->sk_stamp); 491 if (ts.tv_sec == -1) 492 return err; 493 if (ts.tv_sec == 0) { 494 sk->sk_stamp = ktime_get_real(); 495 ts = ktime_to_timespec(sk->sk_stamp); 496 } 497 err = 0; 498 if (put_user(ts.tv_sec, &ctv->tv_sec) || 499 put_user(ts.tv_nsec, &ctv->tv_nsec)) 500 err = -EFAULT; 501 return err; 502 } 503 EXPORT_SYMBOL(compat_sock_get_timestampns); 504 505 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, 506 char __user *optval, int __user *optlen) 507 { 508 int err; 509 struct socket *sock = sockfd_lookup(fd, &err); 510 511 if (sock) { 512 err = security_socket_getsockopt(sock, level, optname); 513 if (err) { 514 sockfd_put(sock); 515 return err; 516 } 517 518 if (level == SOL_SOCKET) 519 err = compat_sock_getsockopt(sock, level, 520 optname, optval, optlen); 521 else if (sock->ops->compat_getsockopt) 522 err = sock->ops->compat_getsockopt(sock, level, 523 optname, optval, optlen); 524 else 525 err = sock->ops->getsockopt(sock, level, 526 optname, optval, optlen); 527 sockfd_put(sock); 528 } 529 return err; 530 } 531 532 struct compat_group_req { 533 __u32 gr_interface; 534 struct __kernel_sockaddr_storage gr_group 535 __attribute__ ((aligned(4))); 536 } __packed; 537 538 struct compat_group_source_req { 539 __u32 gsr_interface; 540 struct __kernel_sockaddr_storage gsr_group 541 __attribute__ ((aligned(4))); 542 struct __kernel_sockaddr_storage gsr_source 543 __attribute__ ((aligned(4))); 544 } __packed; 545 546 struct compat_group_filter { 547 __u32 gf_interface; 548 struct __kernel_sockaddr_storage gf_group 549 __attribute__ ((aligned(4))); 550 __u32 gf_fmode; 551 __u32 gf_numsrc; 552 struct __kernel_sockaddr_storage gf_slist[1] 553 __attribute__ ((aligned(4))); 554 } __packed; 555 556 #define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \ 557 sizeof(struct __kernel_sockaddr_storage)) 558 559 560 int compat_mc_setsockopt(struct sock *sock, int level, int optname, 561 char __user *optval, unsigned int optlen, 562 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int)) 563 { 564 char __user *koptval = optval; 565 int koptlen = optlen; 566 567 switch (optname) { 568 case MCAST_JOIN_GROUP: 569 case MCAST_LEAVE_GROUP: 570 { 571 struct compat_group_req __user *gr32 = (void *)optval; 572 struct group_req __user *kgr = 573 compat_alloc_user_space(sizeof(struct group_req)); 574 u32 interface; 575 576 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) || 577 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) || 578 __get_user(interface, &gr32->gr_interface) || 579 __put_user(interface, &kgr->gr_interface) || 580 copy_in_user(&kgr->gr_group, &gr32->gr_group, 581 sizeof(kgr->gr_group))) 582 return -EFAULT; 583 koptval = (char __user *)kgr; 584 koptlen = sizeof(struct group_req); 585 break; 586 } 587 case MCAST_JOIN_SOURCE_GROUP: 588 case MCAST_LEAVE_SOURCE_GROUP: 589 case MCAST_BLOCK_SOURCE: 590 case MCAST_UNBLOCK_SOURCE: 591 { 592 struct compat_group_source_req __user *gsr32 = (void *)optval; 593 struct group_source_req __user *kgsr = compat_alloc_user_space( 594 sizeof(struct group_source_req)); 595 u32 interface; 596 597 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) || 598 !access_ok(VERIFY_WRITE, kgsr, 599 sizeof(struct group_source_req)) || 600 __get_user(interface, &gsr32->gsr_interface) || 601 __put_user(interface, &kgsr->gsr_interface) || 602 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group, 603 sizeof(kgsr->gsr_group)) || 604 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source, 605 sizeof(kgsr->gsr_source))) 606 return -EFAULT; 607 koptval = (char __user *)kgsr; 608 koptlen = sizeof(struct group_source_req); 609 break; 610 } 611 case MCAST_MSFILTER: 612 { 613 struct compat_group_filter __user *gf32 = (void *)optval; 614 struct group_filter __user *kgf; 615 u32 interface, fmode, numsrc; 616 617 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || 618 __get_user(interface, &gf32->gf_interface) || 619 __get_user(fmode, &gf32->gf_fmode) || 620 __get_user(numsrc, &gf32->gf_numsrc)) 621 return -EFAULT; 622 koptlen = optlen + sizeof(struct group_filter) - 623 sizeof(struct compat_group_filter); 624 if (koptlen < GROUP_FILTER_SIZE(numsrc)) 625 return -EINVAL; 626 kgf = compat_alloc_user_space(koptlen); 627 if (!access_ok(VERIFY_WRITE, kgf, koptlen) || 628 __put_user(interface, &kgf->gf_interface) || 629 __put_user(fmode, &kgf->gf_fmode) || 630 __put_user(numsrc, &kgf->gf_numsrc) || 631 copy_in_user(&kgf->gf_group, &gf32->gf_group, 632 sizeof(kgf->gf_group)) || 633 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist, 634 numsrc * sizeof(kgf->gf_slist[0])))) 635 return -EFAULT; 636 koptval = (char __user *)kgf; 637 break; 638 } 639 640 default: 641 break; 642 } 643 return setsockopt(sock, level, optname, koptval, koptlen); 644 } 645 EXPORT_SYMBOL(compat_mc_setsockopt); 646 647 int compat_mc_getsockopt(struct sock *sock, int level, int optname, 648 char __user *optval, int __user *optlen, 649 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *)) 650 { 651 struct compat_group_filter __user *gf32 = (void *)optval; 652 struct group_filter __user *kgf; 653 int __user *koptlen; 654 u32 interface, fmode, numsrc; 655 int klen, ulen, err; 656 657 if (optname != MCAST_MSFILTER) 658 return getsockopt(sock, level, optname, optval, optlen); 659 660 koptlen = compat_alloc_user_space(sizeof(*koptlen)); 661 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) || 662 __get_user(ulen, optlen)) 663 return -EFAULT; 664 665 /* adjust len for pad */ 666 klen = ulen + sizeof(*kgf) - sizeof(*gf32); 667 668 if (klen < GROUP_FILTER_SIZE(0)) 669 return -EINVAL; 670 671 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) || 672 __put_user(klen, koptlen)) 673 return -EFAULT; 674 675 /* have to allow space for previous compat_alloc_user_space, too */ 676 kgf = compat_alloc_user_space(klen+sizeof(*optlen)); 677 678 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) || 679 __get_user(interface, &gf32->gf_interface) || 680 __get_user(fmode, &gf32->gf_fmode) || 681 __get_user(numsrc, &gf32->gf_numsrc) || 682 __put_user(interface, &kgf->gf_interface) || 683 __put_user(fmode, &kgf->gf_fmode) || 684 __put_user(numsrc, &kgf->gf_numsrc) || 685 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group))) 686 return -EFAULT; 687 688 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen); 689 if (err) 690 return err; 691 692 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) || 693 __get_user(klen, koptlen)) 694 return -EFAULT; 695 696 ulen = klen - (sizeof(*kgf)-sizeof(*gf32)); 697 698 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) || 699 __put_user(ulen, optlen)) 700 return -EFAULT; 701 702 if (!access_ok(VERIFY_READ, kgf, klen) || 703 !access_ok(VERIFY_WRITE, gf32, ulen) || 704 __get_user(interface, &kgf->gf_interface) || 705 __get_user(fmode, &kgf->gf_fmode) || 706 __get_user(numsrc, &kgf->gf_numsrc) || 707 __put_user(interface, &gf32->gf_interface) || 708 __put_user(fmode, &gf32->gf_fmode) || 709 __put_user(numsrc, &gf32->gf_numsrc)) 710 return -EFAULT; 711 if (numsrc) { 712 int copylen; 713 714 klen -= GROUP_FILTER_SIZE(0); 715 copylen = numsrc * sizeof(gf32->gf_slist[0]); 716 if (copylen > klen) 717 copylen = klen; 718 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen)) 719 return -EFAULT; 720 } 721 return err; 722 } 723 EXPORT_SYMBOL(compat_mc_getsockopt); 724 725 726 /* Argument list sizes for compat_sys_socketcall */ 727 #define AL(x) ((x) * sizeof(u32)) 728 static unsigned char nas[21] = { 729 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), 730 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), 731 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), 732 AL(4), AL(5), AL(4) 733 }; 734 #undef AL 735 736 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) 737 { 738 return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); 739 } 740 741 asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg, 742 unsigned int vlen, unsigned int flags) 743 { 744 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 745 flags | MSG_CMSG_COMPAT); 746 } 747 748 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) 749 { 750 return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); 751 } 752 753 asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned int flags) 754 { 755 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT); 756 } 757 758 asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len, 759 unsigned int flags, struct sockaddr __user *addr, 760 int __user *addrlen) 761 { 762 return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen); 763 } 764 765 asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg, 766 unsigned int vlen, unsigned int flags, 767 struct compat_timespec __user *timeout) 768 { 769 int datagrams; 770 struct timespec ktspec; 771 772 if (COMPAT_USE_64BIT_TIME) 773 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 774 flags | MSG_CMSG_COMPAT, 775 (struct timespec *) timeout); 776 777 if (timeout == NULL) 778 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 779 flags | MSG_CMSG_COMPAT, NULL); 780 781 if (get_compat_timespec(&ktspec, timeout)) 782 return -EFAULT; 783 784 datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen, 785 flags | MSG_CMSG_COMPAT, &ktspec); 786 if (datagrams > 0 && put_compat_timespec(&ktspec, timeout)) 787 datagrams = -EFAULT; 788 789 return datagrams; 790 } 791 792 asmlinkage long compat_sys_socketcall(int call, u32 __user *args) 793 { 794 int ret; 795 u32 a[6]; 796 u32 a0, a1; 797 798 if (call < SYS_SOCKET || call > SYS_SENDMMSG) 799 return -EINVAL; 800 if (copy_from_user(a, args, nas[call])) 801 return -EFAULT; 802 a0 = a[0]; 803 a1 = a[1]; 804 805 switch (call) { 806 case SYS_SOCKET: 807 ret = sys_socket(a0, a1, a[2]); 808 break; 809 case SYS_BIND: 810 ret = sys_bind(a0, compat_ptr(a1), a[2]); 811 break; 812 case SYS_CONNECT: 813 ret = sys_connect(a0, compat_ptr(a1), a[2]); 814 break; 815 case SYS_LISTEN: 816 ret = sys_listen(a0, a1); 817 break; 818 case SYS_ACCEPT: 819 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0); 820 break; 821 case SYS_GETSOCKNAME: 822 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); 823 break; 824 case SYS_GETPEERNAME: 825 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); 826 break; 827 case SYS_SOCKETPAIR: 828 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); 829 break; 830 case SYS_SEND: 831 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); 832 break; 833 case SYS_SENDTO: 834 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); 835 break; 836 case SYS_RECV: 837 ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]); 838 break; 839 case SYS_RECVFROM: 840 ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], 841 compat_ptr(a[4]), compat_ptr(a[5])); 842 break; 843 case SYS_SHUTDOWN: 844 ret = sys_shutdown(a0, a1); 845 break; 846 case SYS_SETSOCKOPT: 847 ret = compat_sys_setsockopt(a0, a1, a[2], 848 compat_ptr(a[3]), a[4]); 849 break; 850 case SYS_GETSOCKOPT: 851 ret = compat_sys_getsockopt(a0, a1, a[2], 852 compat_ptr(a[3]), compat_ptr(a[4])); 853 break; 854 case SYS_SENDMSG: 855 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); 856 break; 857 case SYS_SENDMMSG: 858 ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]); 859 break; 860 case SYS_RECVMSG: 861 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); 862 break; 863 case SYS_RECVMMSG: 864 ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3], 865 compat_ptr(a[4])); 866 break; 867 case SYS_ACCEPT4: 868 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]); 869 break; 870 default: 871 ret = -EINVAL; 872 break; 873 } 874 return ret; 875 } 876